MIDDLE YANG-TZ'i-KIANG GORGES 593 



difficult rapid, just at a place where the river made a rectangular 

 turn. This too was negotiated with remarkable skill by the two 

 steersmen standing, the one fore and the other aft; these two men 

 and myself being the only members of the party to remain on board 

 the sloop, the others preferring to walk along the river banks. 



These last two anticlines must be considered as the easterly 

 prolongation of those of the gorge of K'ui-chou-fu. We see that 

 these two anticlines, having diverged east of K'ui-chou-fu, have got 

 limbs of almost equal dip, and have therefore become lower from 

 west to east, especially the southern one. 



It takes nearly two hours to go down stream from Sin-t'an-hia to 

 the lower end of the last gorge and twenty minutes more through the 

 synclinal area to Wu-shan. 



From K'ui-shi-li-p'u to Wu-shan five anticlines with an almost 

 equatorial direction, which lie close together, are thus transected 

 by the Ta-ning-ho. Just below Wu-shan the Yang-tzi makes a bend 

 like the one below K'ui-chou-fu, and leaves the steeply NNW-dipping 

 reddish-brown formation, to enter the 80° NNW-dipping gorges- 

 limestone formation. In this second of the grand gorges of the 

 middle Yang-tzi the river flows at first almost in the trend of the 

 layers, only gradually reaching deeper levels. This already points 

 to the sinking of the anticline, to which this limb belongs, viz., in an 

 easterly direction. Just upstream before the hamlet Klao-che, the 

 river, which in this part of the gorge has but slightly narrowed, enters 

 the underlying formation, the olive-green Sin-t'an shale, of which the 

 upper part is brownish red. We now perceive on the left bank a 

 very fine dome' in the gorges-limestone formation, below which the 

 observed Sin-t'an shale are situated (see Fig. 2). We also observed 

 that from west to east the Sin-t'an shale remains much lower, which 

 also points to a sinking of the anticline toward the east. After having 

 for a short distance transected the southern limb of this anticline in the 

 gorges-limestone, below Wen-che-chi we find very markedly plicated 



I Willis and Blackwelder, op. cit., Vol. I, p. 287: "Northwest of the grand arch 

 of the Wu-shan limestone, probably one of the most superb exposures of a fold in the 

 world, the K'ui-chou red beds occur in the syncline, and the Yang-tzi valley is developed 

 in them for some miles westward." From the above it is clear that in this case under 

 the K'ui-chou red beds must be understood the reddish-brown and the slaty lime- 

 stone formation, but not the proper K'ui-chou series. 



